1604831623 has 2 divisors, whose sum is σ = 1604831624. Its totient is φ = 1604831622.

The previous prime is 1604831621. The next prime is 1604831639. The reversal of 1604831623 is 3261384061.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1604831623 - 2¹ = 1604831621 is a prime.

Together with 1604831621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604831621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802415811 + 802415812.

It is an arithmetic number, because the mean of its divisors is an integer number (802415812).

Almost surely, 2^1604831623 is an apocalyptic number.

1604831623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604831623 is an equidigital number, since it uses as much as digits as its factorization.

1604831623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1604831623 is about 40060.3497613288. The cubic root of 1604831623 is about 1170.7832248134.

The spelling of 1604831623 in words is "one billion, six hundred four million, eight hundred thirty-one thousand, six hundred twenty-three".